WISPIT 2
The disk around WISPIT 2 with VLT SPHERE. The protoplanet WISPIT 2b is inside the gap of the disk on the lower right Credit: ESO/R. F. van Capelleveen et al. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 23m 17.03s |
| Declination | −07° 40′ 55.1″ |
| Apparent magnitude (V) | 11.60±0.12 |
| Characteristics | |
| Evolutionary stage | pre-main-sequence |
| Variable type | T Tau |
| Astrometry | |
| Radial velocity (Rv) | −16.23±14.58 km/s |
| Proper motion (μ) | RA: 6.308±0.024 mas/yr Dec.: −27.138±0.018 mas/yr |
| Parallax (π) | 7.4649±0.0214 mas |
| Distance | 437 ± 1 ly (134.0 ± 0.4 pc) |
| Details | |
| Mass | 1.08+0.06 −0.17 M☉ |
| Radius | 1.418±0.004 R☉ |
| Luminosity (bolometric) | 0.699±0.021 L☉ |
| Surface gravity (log g) | 4.00±0.25 cgs |
| Temperature | 4400±50 K |
| Rotation | 4.7004 days |
| Age | 5.1+2.4 −1.3 Myr |
| Other designations | |
| TYC 5709-354-1, IRAS 19205-0746, IRAS F19205-0746, Gaia DR2 4207586980945067648 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WISPIT 2 (also called TYC 5709-354-1) is a pre-main-sequence star in the constellation Aquila. It is part of the Scorpius-Centaurus OB association, likely belonging to the subgroup Theia 53. The star has a directly imaged circumstellar disk with multiple rings and one directly imaged protoplanet inside one of the gaps. This protoplanet was also detected in H-alpha, showing it is surrounded by a circumplanetary disk. The star is named after the astronomical survey Wide Separation Planets In Time (WISPIT) in the course of which the protoplanetary system was discovered.